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Enable check-* cmake targets of compiler-rt #21

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17 changes: 17 additions & 0 deletions README.md
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Original file line number Diff line number Diff line change
Expand Up @@ -211,3 +211,20 @@ ccache - the main reason for not removing `./build` automatically, aside from
simplifying the debugging in case of errors, is not to run `rm -rf` with
computed paths, as this can be harmful to the host system in case of
misconfiguration.

## Testing run-time libraries

It is possible to make use of the build directories configured during a
non-containerized build to execute the tests of run-time libraries.
On an x86_64 host, this requires qemu-user to be installed.

```bash
./build.sh sources ...
./build.sh host-build
cd build/compiler-rt-full-aarch64-linux-pauthtest
ninja check-profile
```

Not all test cases currently pass, nevertheless this environment is basically
usable to evaluate the changes to these libraries against their regression
test suites.
12 changes: 12 additions & 0 deletions cmake/compiler-rt-common.cmake
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Expand Up @@ -5,3 +5,15 @@ set(COMPILER_RT_BUILD_SANITIZERS FALSE CACHE BOOL "" FORCE)
set(COMPILER_RT_BUILD_XRAY FALSE CACHE BOOL "" FORCE)
set(COMPILER_RT_BUILD_MEMPROF FALSE CACHE BOOL "" FORCE)
set(COMPILER_RT_BUILD_ORC FALSE CACHE BOOL "" FORCE)

# Enable `check-*` targets, so that they can be manually executed after
# building the toolchain with `./build.sh host-build`.
set(test_cflags "")
set(sysroot_lib_path "${TOOLCHAIN_BUILD_INSTALL_DIR}/${TOOLCHAIN_BUILD_TARGET}/usr/lib")
string(APPEND test_cflags " -march=armv8.3-a+pauth")
string(APPEND test_cflags " -Wl,--rpath=${sysroot_lib_path}")
string(APPEND test_cflags " -L ${sysroot_lib_path}")
string(APPEND test_cflags " -Wl,--dynamic-linker=${sysroot_lib_path}/libc.so")
set(COMPILER_RT_TEST_COMPILER_CFLAGS "${test_cflags}" CACHE STRING "" FORCE)
set(COMPILER_RT_CAN_EXECUTE_TESTS TRUE CACHE BOOL "" FORCE)
set(COMPILER_RT_INCLUDE_TESTS TRUE CACHE BOOL "" FORCE)
8 changes: 8 additions & 0 deletions scripts/build-compiler-rt.sh
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Expand Up @@ -5,6 +5,7 @@ cd "$(dirname "$0")"
. ./global-vars

COMPILER_RT_INSTALL_PREFIX="$("$INSTALL_DIR/bin/clang" --print-resource-dir)"
normalized_triple="$("$INSTALL_DIR/bin/clang" -target $CROSS_TARGET --print-target-triple)"

# Assertion: COMPILER_RT_INSTALL_PREFIX should be under INSTALL_DIR.
rel_install_prefix="$(realpath --relative-to="$INSTALL_DIR" "$COMPILER_RT_INSTALL_PREFIX")"
Expand All @@ -27,4 +28,11 @@ cmake \
-C "$CMAKE_DIR/compiler-rt-common.cmake" \
-C "$CMAKE_DIR/compiler-rt-${COMPILER_RT_BUILD}.cmake"

# Provide the run-time libraries to link the tests executables.
mkdir -p "${BUILD_DIR}/lib/${normalized_triple}"
ln -sr "${COMPILER_RT_INSTALL_PREFIX}/lib/${normalized_triple}/clang_rt.crtbegin.o" \
"${COMPILER_RT_INSTALL_PREFIX}/lib/${normalized_triple}/clang_rt.crtend.o" \
"${COMPILER_RT_INSTALL_PREFIX}/lib/${normalized_triple}/libclang_rt.builtins.a" \
"${BUILD_DIR}/lib/${normalized_triple}"

cmake --build "$BUILD_DIR" --target install -- -j$CPU_COUNT